Hey all, getting back into astronomy after a 7 year break and planning on buying a cheap skywatcher 80/400 ($229) refractor as a second scope.
To fund it i am looking to sell one of my eyepiece from below.
Any thoughts on which would be most expendable?
I am thinking the 16mm nagler atm.

Reason for cheap scope was to have a travel/widefield/land scope that my 4 year old son can also use next to his daddys big one!
(Maybe even use as finderscope too on the dob)
Would love an ed80 but price including mount is too much

I'd be bolder. Sell them all while they're worth something, they're getting long in the tooth.

You really only need 3 eyepieces.

At the low and midrange theres a new range which are bargains IMHO - 15 and 30 mm APM UltraFlats which would do nicely in both the dob and a small refractor - note the field curvature of the refractor is opposite to that of the dob, and Naglers and Pans primarily suit dobs, so a flat field eyepiece is about as good a compromise as you could get to suit both scopes.

Keep the Pan 24, Nagler 13 and Pentax XW8 and sell the rest as you really only need 3 eyepieces IMHO.
The change should suffice for a modest scope and mount and maybe a couple if cheapie eyepieces to go with it.

+1
Pan24, N13T6 and XF8.5 would be a great trio of eyepieces
The Pan24 make the D21 superfluous
The N16T5 likewise is very close to the 13 which is superb and has a little more eye relief than the 16.
The XF8.5 is excellent!

5, only because I have a turret that holds 5 and it gets unbalanced if I don't load it fully. Of those in practice I only use 3 - 25 SLV, 14SSW and 9 SLV. The 12 SLV is nowhere near as good as the 14SSW, and as for the 6 and 4 SLV's... they were to use with the 130 APO but now that's gone they're useless with the MK91.

5, only because I have a turret that holds 5 and it gets unbalanced if I don't load it fully. Of those in practice I only use 3 - 25 SLV, 14SSW and 9 SLV. The 12 SLV is nowhere near as good as the 14SSW, and as for the 6 and 4 SLV's... they were to use with the 130 APO but now that's gone they're useless with the MK91.

One of these days I'll swap 4 SLVs for 2 APM Ultraflats.

There's a 20mm APM with crosshairs in the finder...

I recently reduced my eyepiece holdings quite a bit by selling anything that wouldn't work in the TEC, or overlapped my Ethos holdings, but it only lasted a few days then a friend of Mr Takahashi sent a box to me containing several of his finest Abbes.... C'est la vie

I would keep the 16NT5 for use on a finder 'scope even the ST80 if you decide to use it for that purpose later. It will give you 25x and over 3 deg. field at over 3mm exit pupil in the ST80. I use one on my Stellarvue 80mm finder.

If you ever want the 16mm back it will likely cost you more to replace it. Meanwhile as you save for the ST80 keep sharing your current 'scope and the sky with your youngster to keep the interest.

I recently reduced my eyepiece holdings quite a bit by selling anything that wouldn't work in the TEC, or overlapped my Ethos holdings, but it only lasted a few days then a friend of Mr Takahashi sent a box to me containing several of his finest Abbes.... C'est la vie